I just recieved the notice that im up for smog test in southern california. Its a 77 with a bored out L28. Its bored 90 over and is running cams and the works. I am running 2 1/2 inch pipe with headers and a dynomax muffler. I have no cat and my emissions system is not hooked up. Do you think i will be able to pass smog by just putting a cat. on ? Or will i have to get custom tubes to line up with the headers.?